Treating ores.



U. WEDGE.

TREATING oR'Es.

APPLICATION FILED OCT. 7, I9II. RENEWED JULY I, 19.15.

1,170,375. Patented FPI).F 1, 1910.

2 SHEETS-SHEET l.

U. WEDGE.

TREATING ORES.

APPLICATION FILED ocT. 7. I9II. RENEwED IuLY I, I9I5.

1,170,375. Patented Feb. 1, 19H3.

2 SHEETS-SHEET 2.

passes intothe lower section of the furnace Vthrougl'a whose-treating chambers a circulati'on of such' heated products of combustion ,is maintained. Wl ii1e, therefore, the ore is subjected eventuallyto a suciently high for ledecting the' heating tbe gasftilue4 which "stack 2; ,and tbe air or communicatingwith 'aappe lll' similar to temperature to ,complete 'itsfdesulfurization or other desired final treatment the prelimil -nary operation is eected without the direct contact with the consequently gases of combustion, and the gas or gaseous compound produced: in

proper 'condition for or iirefplacesftor the; burning of carbonauel, although ll prefer iornthi's purpose touse one or more oil-or gas burners '9,

communicating with the lowerinost treating Any 4desired arn chamber of the furnace rangement otjpipes orduesmay `be adopted y regenwater-may.beemployed for -tbispurposa llt desired, also, the turnace structure in vwhich thee-dirai ltreatment .or .the

. ,arel is eidected maybe'selparate' from the` imlnary or roastf' structure in which thevfpre ing treatment is' 'carried on',.` ai1d in .ligs. 4L

and 5 il havepillustrated 'such a construction ofthe furnace. otthis furnace is'interposed a structure t0' Between the two members containing the gas and air tiues i and 3,

-the'luppermost treating chamber of tbe tinal sectionfoi the furnace communicating with discharges .throigh a gas beating ue 3 'the twyer pipe oit-an or ary' blast furnace the preliminary operatlon isv `kept free yfrom contamination with the" products of combustion andconsequentl Ain its *subsequent uti iza-l l of the incoming .airorfgas suppyfby means oitthe outdowing volume of the productsA of combustion, an;v arrangement similar J to the-swell lmown f iSiemens `the ore during -bustible constituents or l treatment products or which the material is treated during the irs't stage of the process by means of the Waste products of combustion escaping after the treatment of the material during the second stage of the process, such heating may be eiectedcby independent means, if desired.

.l claim:

The mode herein described of treating ores, which consists in subjecting the same to a two-stage treatment, feeding the ore over one or more hearths in each stage of the treatment, conveying the ore from the primary to the secondary stage of the treatment without vpermittlng passage ci' products oicombustion from the secondar to the primary stage, supplying heated au' to the primary stage oi treatment in order to edect ignition ot the comthe ore, supplying to the ore during the secondary stage ot the combustion derived from fuel independent of that constituting the furnace charge, and utilizing the escaping products of combustion `from the secondary stage of the treatment to heat the air employed f for' etiecting combustion of the charge in the primary stage.

. lln testimony-whereof, l( have signed my name to this specification in the presence ot two subscribing witnesses.

Kern A. lltnannn, Herrmann' )DL Tensen. 

